Air pump



July 22, 1930. E. B. FUQUA 1,771,211

AIR PUMP Filed Oqt. 22. 1928 ION .ZZ/IQF/Yra [dram/471 0504 Patented July 22, 1930- PATAENTIVOQF'FICE I EDWARD 1a. FUQUA,'OF Hummus, TENNESSEE AIR PUMP iA pplicati on filed October22, 192s. Serial No. 314.,o4e.

In many cases water is pumped from a well and deliveredto a storage tank against air pressure. In such tank the expansion of the air in the tank is counted on to maintain 5 pressure for delivery purposes. It is found that the supply of air gradually diminishes so'that it is necessary frequently to replace the supply or at least to augment it. To accomplish this it has become the custom to'prob vide some kind of air pump in connection with the ordinary water pump, and this invention relates to such air pump and especially to suchpumps for usein connection with deep well pumps whereby air under pressure may be supplied to thewater raised from the well and with such water be carried to thetank or some other suitable receptacle in which it is desired to maintain a supply 7 of air. for -"expansion purposes. The objects of my invention are: V

(a) To provide an air pump. which is simple-and ieflicient inaction-and which may be actuated from the ordinary. deep well pumprod; V

r (b) To provide means for discontinuing the action of the pumpfat certain times;

and i c) To generally simplify and improve the design and construction of such a device.

The meansby. which the foregoing" and other objects are accomplishedand the manner of their accomplishment will readily be understood from the following specification stantially on the line I- I of Fig. 3.;

L Fig. 2, is a sectional plan onthe line 11-11 of Fig. 1 looking upward; and Fig. 3, is asimilar sectional plan taken on the line TIL-III of Fig, 1.

Referring now to the drawings: in which the various part'sarfe indicated numerals, 10 is a fragmentary portion, of the power '45 head casing of ainordinary deep well pump,

and 11 a'hollo'w, boss integral withthe casing and extending forwardlytherefrom. 12 islthe well pipe which extends downward in the Well. '13 is the ,jp'umprod, The upper endof this ro'dis"reduced'slightly in'diameter leaving annular shoulders 14 and 15, be-

tween which shoulders some form of attaching means may be used to secure the rod to thepump head operating mechanism, not shown; V g r g The rod 13 is provided with threads 16, and a nut 17 is screwed thereon." The upper portion of this nut is cylindrical and the lower portion preferably is squared up to receive a wrench. 18 is the cup leather which is held downagainst the nut 17 by a second nut 19, which nuts together with the .cup leather form the air pump plunger. 20 is anairpumpcylinder, which is disposed in v and secured to an annular flange 21. This flange'in'turn is carried by thehollow bossll to which it is preferably secured by screws 22. The lower end of'the cylinder projects below the flange 21 preferably extend. 'ing somewhatbelowthe upper end of the I pipe '12. The {lower end or; thef cylinder 20 is'closed by ahead 23 which mayv be secured to the cylinder .as'by the rivets24. The piston rod- 13 passes centrally through this head y and ordinarily is fairly jclosely embraced thereby, butnoattemp't is made to make a Water or air tight joint between these parts. '25 is an'annular'cylindricalextension integral withjthe head 23 and depending below the same: Y an'annular flange preferably secured on the lower end ofth'e'annular cylinder 25 by threads. 27 is an annularplate rotatably mounted on theannular cylin-der 25, and snugly seated against the lower surface "of the head 23, against which it is held bya compression spring 28. Thehead 23 and plat e.27 are provided respectively with holes orports 29 and30which may be registered to providepassages through the head and "ably mounted inaboss 32, on the head23, and extends thence upward through the holthe flange 21; The stufiing box 33 provides the plate 27, this hole being slotted to the edge of the plate to permit movement of the pin therein. When the rod 31 is disposed in the position shown in Fig. 3 the ports are shifted out of register.

35 is an air passageway drilled down through the center of the rod 13 to apoint below the point of attachment of the air pump plunger and thence connected by a lateral channel 36 into the air cylinder 20. The upper end of the pump rod is provided with a somewhat larger chamber 37 in which is screwed a valve seat against which a valve-39 is held by a compression spring 40.

41 is the water discharge pipe leading from the hollow boss 11 to a storage, tank.

The operation of the pump is as follows; with the plate 27 set as shown so that the holes therethroughregister with the holes in the air cylinder head, the up stroke of the pump rod 13 would draw air through these openings and on down stroke this airwould be forced out through these openings until the water supply brought up from below fills the pipe 12 and the hollow boss 11, after which, movement of the air plunger simply churns water into and out of the air cylinder.

Should however it be desired to force air out through thepipe tlalong with the water discharged, the rod 81 is turned to shift the holes 30 outof register with the holes 29, thereafter on the up stroke the ;plate 27 seating againstthe head 23 would cut oif'the air supply from that direction and cause air to be drawn past the valve 39 and downward through the passage-way35intothe air cylinder 20. .On the down stroke the-airplunger would force the air from thecylinder 20 through the holes29 displacing the plate 27,

by compressing-the spring 28, and forcingthe air out into the water .in thepipe 13.

At the end of the stroke the plate 27 immediately seats against the head 23c1osing oil the holes 29, and on the up stroke the air just forced out of the air cylinder is carried 11pward with the stream of water pumped from below and discharged through the pipe 41 to such receptacle as may have been provided.

It will be seen that during pumping the operator can at any time readily cut the air on or off asmay be desired.

It will also be noted that byraising the well pump rod to bring nut 17 above the air cylinder, the top nut 19 may be unscrewed and the cup leather removed and replaced without necessity of removing pump rod from the well.

Having described my invention, what I claim is:

1. In anair .pump,.a cylinder, a reciprocable .rod disposed axially thereth-rough, a plunger withinsaid cylinder secured to said pump rod and .reciprocable therewith, said pump rod having a chamber therein, above said plunger, and .a passageway leading downward therefrom and into said cylinder below said plunger, a valve seat within said chamber, a valve adapted to seat against the under side of said seat, a spring urging said valve against said seat, an annular head surrounding said pump rod, closing the lower end of said cylinder, said head having a plurality of ports therethrough, an annular plate having ports adapted to be registered with the ports in said head, a spring urging said plate against the outer side of said head, and means for shifting said plate to bring said ports into and out of register with the ports in said head, whereby said air pump may be rendered inoperative or operative as the case may be.

2. In an air pump; a cylinder, a reciprocable rod disposed axially therethrough, a plunger within said cylinder secured to said pump rod and reciprocable therewith, said pump rod having a passageway leading downward therethrough into said cylinder below said plunger, a check valve closing said passageway against pressure from within said cylinder, an annular head, surrounding said pump rod, closing the lower end of said cylinder, said head having a plurality of ports therethrough, an annular plate having ports adapted to be registered with the ports in said head, a spring urging said plate againstthe outer side of said head, and means for shifting said plate to bring said ports into and out of register with the ports in said head whereby said air pump may be rendered inoperative or operative as the case maybe.

3. In an air pump; acylinder, a reciprocable rod disposed axially therethrough, a plunger within said cylinder secured to said rod and reciprocable therewith, said pump rod having .a passageway leading downward therethrough into said cylinder below said plunger, a check valveclosing said passagewayagainst pressure from within saidcylinder, anannular head surrounding said pump rod, closing the lower end of said cylinder said head having a plurality of ports therethrough, an annular plate having ports adapted to be registered with the ports in said head, means yieldably urgingsaid plate against the outer side=of said head, andmeans for shifting said plate .to bring said ports into and out of register with the ports in said head, whereby said air pump may be rendered inoperative or'operative as the case may be.

4. III/{III air pump, a cylinder, at reciprocable pump rod extending axially there through, a plunger within said cylinder secured to, and reciprocable with, said rod, said plunger having a passageway therethrough,.a check valve closing said passage-- way against pressure from Within said cylinder, ,an annular head surrounding said pump rod, closing the lower end of said cylmeans yieldably urgin said plate against the outer side of said hea and meansfor shiftinder, said head having a port therethrough, an annular plate having a port adapted to be registered with the port in said head,

ing said plate to bring said ports into and out of register whereby said air pump may be rendered inoperative or operative as the case may be. I

5.111 an air pump,a cylinder, a reciprocable pump rod extending axially therethrough, a plunger within said cylinder secured to, and reciprocable with, said rod, said plunger having a passageway therethrough, a check valve closing said passageway against pressure from within said cylinder, an annusignature.

EDWARD B. FUQUA. 

